gecko-dev/xpcom/glue/Logging.h

81 строка
2.4 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_logging_h
#define mozilla_logging_h
#include "prlog.h"
#include "mozilla/Assertions.h"
// This file is a placeholder for a replacement to the NSPR logging framework
// that is defined in prlog.h. Currently it is just a pass through, but as
// work progresses more functionality will be swapped out in favor of
// mozilla logging implementations.
namespace mozilla {
// While not a 100% mapping to PR_LOG's numeric values, mozilla::LogLevel does
// maintain a direct mapping for the Disabled, Debug and Verbose levels.
//
// Mappings of LogLevel to PR_LOG's numeric values:
//
// +---------+------------------+-----------------+
// | Numeric | NSPR Logging | Mozilla Logging |
// +---------+------------------+-----------------+
// | 0 | PR_LOG_NONE | Disabled |
// | 1 | PR_LOG_ALWAYS | Error |
// | 2 | PR_LOG_ERROR | Warning |
// | 3 | PR_LOG_WARNING | Info |
// | 4 | PR_LOG_DEBUG | Debug |
// | 5 | PR_LOG_DEBUG + 1 | Verbose |
// +---------+------------------+-----------------+
//
enum class LogLevel {
Disabled = 0,
Error,
Warning,
Info,
Debug,
Verbose,
};
namespace detail {
inline bool log_test(const PRLogModuleInfo* module, LogLevel level) {
MOZ_ASSERT(level != LogLevel::Disabled);
return module && module->level >= static_cast<int>(level);
}
} // namespace detail
} // namespace mozilla
#define MOZ_LOG_TEST(_module,_level) mozilla::detail::log_test(_module, _level)
#define MOZ_LOG(_module,_level,_args) \
PR_BEGIN_MACRO \
if (MOZ_LOG_TEST(_module,_level)) { \
PR_LogPrint _args; \
} \
PR_END_MACRO
#undef PR_LOG
#undef PR_LOG_TEST
/*
* __func__ was standardized in C++11 and is supported by clang, gcc, and MSVC
* 2015. Here we polyfill __func__ for earlier versions of MSVC.
* http://blogs.msdn.com/b/vcblog/archive/2015/06/19/c-11-14-17-features-in-vs-2015-rtm.aspx
*/
#ifdef _MSC_VER
# if _MSC_VER < 1900
# define __func__ __FUNCTION__
# endif
#endif
#endif // mozilla_logging_h